Base64 encoder and decoder

Encode text or a local file, or decode Base64 back to bytes.

Privacy: runs in your browser

This tool processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Favorites store only tool names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. When a button sends your result to another tool, it waits in this tab until that tool opens it, for up to a minute, and is then deleted.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

English

Your text

Direction

URL-safe alphabet

Encode a local file

Or encode a local file

The filename is kept only for your download.

Your result

Choose text or a file

Text mode uses UTF-8. File mode encodes the original bytes without treating them as text. URL-safe replaces the plus and slash characters with a hyphen and underscore. Decoded files can be saved without opening them.

Next: Binary translator

Worked example

Tool Octopus encodes to VG9vbCBPY3RvcHVz. Base64 is a representation, not encryption; anyone with the text can decode it.

Next: URL encoder and decoder

Before you rely on the result

A decoded byte sequence may not be valid UTF-8. Use Download decoded file to retain those bytes. Keep the correct filename extension when saving a file.

Next: HTML entity encoder and decoder

Cite this page

Citation style

ToolOctopus. “Base64 encoder and decoder.” Updated 2026-10-11. https://tooloctopus.com/base64-encoder-decoder.

Add an access date if your instructions require one.

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